The Anaheim Union High School District, which operates its own transportation services, has been investigating the Sept. 11 incident involving the Savanna High School student.

The 15-year-old boy's mother says her son, who is unable to speak and suffers from seizures, sat inside the special education student bus parked at the district transportation yard for most of the day.

Lucie Hoang-Ngo tells the Orange County Register that she asked to meet with district administrators for several weeks in hopes of getting an apology and a detailed explanation of what went wrong.

But she says very little information has been provided.

District spokeswoman Pat Karlak says she cannot comment on an ongoing investigation.

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